This study will be the foundation of an innovative program of research designed to investigate how to communicate the complex concepts of genomics to the general public. The focus of the study will be one particular concept, the idea that genetic and environmental factors interact to affect risk of common diseases. One objective of this study will be to examine the effects of pedagogical modality (i.e., learning mode) on conceptual understanding (i.e., comprehension). A learning-by-doing (i.e., self-driven, interactive activities) condition will be compared to a learning-by-assimilation (i.e., lecture) condition to assess the effects on comprehension. The second objective of the study is to examine possible moderation of the hypothesized relationship between learning mode and comprehension by health literacy or genetic literacy (i.e., literacy skills related to these specific content areas). The third study objective is to explore possible mediators of the relationship between learning mode and comprehension. These experiments will be conducted in the NIH Immersive Virtual Environment Testing area in order to hold presentation medium constant while comparing the two learning modes. 150 participants will be for the experimental comparison phase. Because in the primary focus of the study is how the general public learns best, study participants will be healthy adult volunteers without specialized genetics knowledge. Exclusion criteria include self-reported diagnosis with epilepsy, vision or hearing problems, and vestibular disorders (e.g., dizziness, vertigo, motion sickness). Two learning-by-doing virtual environments (IVEs) and two learning-by-assimilation IVEs have been developed and pilot tested, and the IVEs that best convey the idea of gene-environment interactions have been selected for the experimental comparison. Participants will be randomized to one of two conditions: Learning-by-doing or Learning-by-assimilation; each participant will complete one IVE. The study will have two primary outcomes, both measures of comprehension: a fourteen-item measure of recall (i.e., remembering content as presented) and a six-item measure of transfer (i.e., applying content to new situations). These data will provide a foundation for a program of research investigating how best to communicate genomic concepts to the general public and, eventually, the development of effective genomic communication strategies for disease prevention interventions.